non-nutrient/non-botanical

N-Acetyl Cysteine supplements

Half of the 1,259 N-acetyl cysteine supplements in the NIH label database that print an amount list 150 mg or less per serving; the middle half list 55 mg to 500 mg (DSLD version 9.4.0, January 2026). The 140 products whose only supplement ingredient is N-acetyl cysteine list a median of 600 mg.

How much N-acetyl cysteine do supplements contain?

The median product lists 150 mg per serving. One in ten lists 25 mg or less, one in ten 600 mg or more. The amount printed most often is 100 mg (178 products).

Which products list the most N-acetyl cysteine?

On-market products, per serving, with a plausible amount: the rule leaves out likely entry slips, such as an amount far beyond every other label with no %DV or strength on the label to back it (each product page still shows its own amount, marked).

• NAC + Glycine Powder Natural Peach Ginger FlavorPure Encapsulations1,800 mg
• N-Acetyl-L-Cysteine 1600 mgNaturaLife Labs1,600 mg
• VirunexHoltraCeuticals1,500 mg
• NAC N-Acetyl-L-Cysteine 600 mgThe Vitamin Shoppe1,200 mg
• Anti-Alcohol Antioxidants With HepatoProtection ComplexLife Extension1,200 mg
• Anti-Alcohol With HepatoProtection ComplexLife Extension1,200 mg
• Ar1macare ProOlympus Labs1,200 mg
• Anti-Alcohol HepatoProtection ComplexLife Extension1,200 mg

Have the amounts changed over the years?

Products whose current label entered DSLD in 2012 list a median of 100 mg; those entered in 2025, 200 mg.

In which products and brands?

Brands listing it most: Douglas Laboratories (45), XYMOGEN (36), Source Naturals (29), Pure Encapsulations (26), Integrative Therapeutics (22), Metagenics (20), Life Extension (20), Natural Factors (17), NuMedica (16), Ortho Molecular Products (14).

Every product listing N-acetyl cysteine

1,682 products, A to Z by name (page 20 of 34), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

• N-Acetyl Cysteine 100 mgKirkman100 mg
• N-Acetyl Cysteine 1000 mgDouble Wood Supplements1,000 mg
• N-Acetyl Cysteine 1800 mgSuperSmart · off the market1,800 mg
• N-Acetyl Cysteine 500 mgDaVinci Laboratories of Vermont · off the market500 mg
• N-Acetyl Cysteine 500 mgBIOVEA1,000 mg
• N-Acetyl Cysteine 500 mgDaVinci Laboratories500 mg
• N-Acetyl Cysteine 600 mgPuritan's Pride600 mg
• N-Acetyl Cysteine 600 mgVitaCeutical Labs600 mg
• N-Acetyl Cysteine 600 mgVSN Vital Strength Nutrition · off the market600 mg
• N-Acetyl Cysteine 600 mgPhysioLogics · off the market600 mg
• N-Acetyl Cysteine 600 mgGood 'N Natural · off the market600 mg
• N-Acetyl Cysteine 600 mgVitamer Laboratories600 mg
• N-Acetyl Cysteine 600 mgSuperSmart · off the market1,800 mg
• N-Acetyl Cysteine 600 mgNatural Nutra600 mg
• N-Acetyl Cysteine 600 mgSource Naturals600 mg
• N-Acetyl Cysteine 600 mgSwanson600 mg
• N-Acetyl Cysteine 600 mg Free FormVitamin World600 mg
• N-Acetyl Cysteine 750 mgLifeSeasons Essentials750 mg
• N-Acetyl Cysteine N.A.C. w/Liver Safeguard 1000 mgRemedys Nutrition600 mg
• N-Acetyl L-CysteineHard Rhino600 mg
• N-Acetyl L-CysteineBulkSupplements.com · off the market600 mg
• N-Acetyl L-Cysteine (NAC)Herbadiet500 mg
• N-Acetyl L-Cysteine (NAC)BulkSupplements.com600 mg
• N-Acetyl L-Cysteine (NAC) PowderHerbadiet500 mg
• N-Acetyl L-Cysteine 400 gramsNootropics Depot500 mg
• N-Acetyl L-Cysteine 600 mgVitacost600 mg
• N-Acetyl L-Cysteine 600 mgBulkSupplements.com600 mg
• N-Acetyl L-Cysteine Capsules 500 mgNootropics Depot · off the market500 mg
• N-Acetyl-CysteineDesigns for Health900 mg
• N-Acetyl-L Cysteine 500 mgNatural Factors · off the market500 mg
• N-Acetyl-L-CysteineKaruna1,000 mg
• N-Acetyl-L-Cysteine 1600 mgNaturaLife Labs1,600 mg
• N-Acetyl-L-Cysteine 250 mgDouglas Laboratories250 mg
• N-Acetyl-L-Cysteine 500 mgDouglas Laboratories500 mg
• N-Acetyl-L-Cysteine 500 mgKlaire Labs · off the market500 mg
• N-Acetyl-L-Cysteine 500 mgNeurobiologix500 mg
• N-Acetyl-L-Cysteine 500 MilligramsMontiff500 mg
• N-Acetyl-L-Cysteine 600 mgDouglas Laboratories600 mg
• N-Acetyl-L-Cysteine 600 mgRoex600 mg
• N-Acetyl-L-Cysteine 600 mgLife Extension600 mg
• N-Acetyl-L-Cysteine 750 mgDouglas Laboratories750 mg
• N-Acetyl-L-Cysteine 750 mgProgressive Professional from Progressive Laboratories750 mg
• N-Acetyl-L-Cysteine 900 mgDouglas Laboratories900 mg
• N-Acetyl-L-Cysteine NACPCOS Nutrition Center900 mg
• N-Acetyl-L-Cysteine NAC 600 mgGNC · off the market600 mg
• N-AcetylcysteineDouglas Laboratories500 mg
• N-Acetylcysteine (NAC) 600 mgWonder Laboratories600 mg
• N-Acetylcysteine (NAC) 600 mgDC600 mg
• N.O.-Xplode XE Edge Blue RaspberryBSN300 mg
• N.O.-Xplode XE Edge Cherry LimeBSN300 mg

Where next?

• Check an amount of N-acetyl cysteine
• Labels above the upper limit
• All ingredients